Equipment for applying a roll of paper or plastics web to a winding apparatus

ABSTRACT

Two separate but like linkages are provided for engaging a respective end of a shaft of a roll of paper or plastics web that is to be applied to mandrels of coiling or uncoiling apparatus. Each linkage comprises a hand lever pivoted by one end to a hooked bar for engaging the end of the roll shaft and pivoted intermediate its ends to another hooked lever for engaging a supporting pin on the coiling or uncoiling apparatus. When the hooks of both linkages have thus been engaged, operation of the hand levers is effective to position the roll in the coiling or uncoiling apparatus so that the roll shaft can be connected to the mandrels.

United States Patent 1191 Schwermann [30] Foreign Application Priority Data July 6, 1970 Gennany P 20 33 M49 [52] US. Cl. 242/5845 [51] Int. Cl B65h 19/30 [58] Field of Search .242/58.6, 58.2, 58

[56] References Cited UNITED STATES PATENTS I 7 2,570,941 Y 10/1951 Grigsby 242/58,6 2,545,337

3/195] Blessing 242/58 FOREIGN PATENTS OR APPLICATIONS 4/1954 Italy 242/585 Primary Examiner-George F. Mautz Assistant Examiner-Edward J. McCarthy Attorney-Fleit, Gipple & Jacobson [57] ABSTRACT Two separate but like linkages are provided for engaging a respective end of a shaft of a roll of paper or plastics web that is to be applied to mandrels of coiling or uncoiling apparatus. Each linkage comprises a hand lever pivoted by one end to a hooked bar for engaging the end of the roll shaft and pivoted intermediate its ends to another hooked lever for engaging a supporting pin on the coiling or uncoiling apparatus. When the hooks of both linkages have thus been engaged, operation of the hand levers is efiective to position the roll in the coiling or uncoiling apparatus so that the roll shaft can be connected to the mandrels.

8 Claims, 3 Drawing Figures 1 EQUIPMENT FOR APPLYING A ROLL OF PAPER OR PLASTICS WEB TO A WINDING APPARATUS The invention relates to equipment for applying a roll of paper or plastics web to a winding apparatus.

Modern machinery for working on paper or plastics webs, for example printing presses or bag and sackmaking machinery, is equipped with special mechanimovement enables the roll to be guided by hand as it cal winding apparatus for uncoiling or coiling the web during operation of the machinery. The full or empty rolls often weigh several hundred weight and lifting a.

roll in or out of the winding apparatus so that its shaft is positioned in or removed from opened couplings of winding mandrels of the apparatus calls for the use of lifting tackle which must be employed very carefully in a restricted available space to avoid damage to the rolls or the webs coiled thereon. Also, the application of the lifting tackle and its correct alignment with respect to the winding mandrels is a time-consuming operation.

The invention aims to provide a simple and cheap device which avoids the use of lifting tackle for the abovementioned purpose and which is easy to operate without the fear of causing damage.

According to the invention, there is provided a 'device for applying a roll of paper or plastics web to a winding apparatus having a frame, winding mandrels supported by the frame for coupling to a shaft of the roll and coaxial supporting-pins mounted on the frame so that they are disposed above the mandrels upon application of the roll, the said device comprising two separate but like linkages each for cooperating with one end of the roll shaft and a respective one of the supporting pins, wherein each linkage comprises a manually operable lever, a first hanger bar pivotally connected at or near one end to a point intermediate the ends of the lever and carrying atits other end a hook for engaging the respective supporting pin, and a second hanger. bar which is pivotally connected to the lever at or near one end of the lever and has a hook for j engaging the respec-tive end of the roll shaft.

The invention also extends to winding apparatus for a roll of paper or plastics web comprising a frame, winding mandrels supported by the frame for coupling to the ends of a shaft of the roll, coaxial supporting pins mounted on the frame so that they are disposed above the mandrels upon application of the roll, and the above-mentioned device for applying the roll to the mandrels, the pivotal connections to'the lever of each linkage and the lengths of the hanger bars being such that the largest spacing of the hooks in each linkage is greater than the distance between the supporting pins and their respective winding mandrels and the smallest spacing of the hooks is less than the said distance.

When the hooks are at their aforementioned largest spacing, they are readily engageable with the supporting pins on the frame of the winding apparatus and with the ends of the shaft of the roll that has been rolled along the ground so that it will be located adjacent the winding apparatus. By swinging the lever of both linkages downwardly, the spacing between the hooks becomes smaller and this causes the roll to be lifted until the ends of its shaft are positioned above the winding mandrels. From this position, the roll can then be lowcred into the open couplings of the winding mandrels by raising the levers of the linkages. Lifting an empty roll from the mandrel couplings takes place in the reverse manner. Since the two separate linkages can indiis lowered into the couplings of the winding mandrels so that the ends of the roll shaft will become accurately located therein. In the case of small rolls which are not so heavy, both linkages can be actuated by one operator who will hold one lever in each hand. For large and heavy rolls, a separate operator is required for each linkage. Lifting the roll into and out of the winding apparatus requires very little time.

The invention is particularly applicable to winding apparatus in which the frame is supported for rotary movement so that very large and heavy rolls are lifted mechanically. In this case,'the supporting pins should be provided ahead of the mandrels as viewed in the direction of frame rotation. This arrangement makes it possible to position a roll adjacent the winding apparatus, apply the linkages loosely to the supporting pins and the shaft roll and then actuate a motor drive for rotating the frame of the winding apparatus so that the roll will be lifted to become suspended vertically above the mandrels, whereupon upward swinging of the levers ofthe linkages will be effective to lower the roll into the mandrel couplings. This procedure requires even less time and of course much less effort on the part of the operator.

Preferably, the lever of each linkage can be locked in k a position at which the hooks are at the aforementioned est hook spacing without much efiqrt whilst the roll is still supported on the ground and then locked in this setting, preferably with the aid of a pawl on the first hanger bar of each linkage co-operating with a tooth on the lever. When the roll is then lifted by means of tuming the frame of the winding apparatus, it will become accurately positioned above the winding mandrels without the operator having to hold the linkages in a particular setting under the heavy weight of theroll.

The second hanger bar may contain a series of holes for receiving a pivot pin connector tothe lever in a selected one of the holes. This enables the pivotable connection of the second hanger bar to be adjusted with respect to the lever, that is to say it enables the hook spacing to be adjusted to suit the mandrel-supporting pin spacing of different winding machines.

An example of the invention will now be described with reference to the accompanying drawing in relation to a winding apparatus having a rotary frame. In the drawings:

FIG. 1 is a part-sectional view (taken on the line IL in FIG. 3) of the winding apparatus having a supply roll for paper or plastics web positioned alongside it and one of the linkages of the device for applying the roll to the apparatus; a

FIG. 2 is a cross-section corresponding to that of FIG. 1 showing the supply roll and the position of the linkage immediately prior to the roll being deposited in mandrels of the winding apparatus, and

FIG. 3 is a front elevation of the winding apparatus viewed in the direction of the arrow III in FIG. 2.

The device for applying a supply roll 3 of paper or plastics web to a winding apparatus comprises two separate but like linkages l, 1' which can be engaged with the respective ends 2, 2' of a shaft of the supply roll and with respective supporting pins 4, 4 on a rotary frame 5, 5' of the winding apparatus. Each of the linkages comprises two hanger bars 6, 7 which are provided with oppositely directed hooks 8, 9. The bar 6 serves to engage one of the supporting pins 4 or 4' and at its end opposite to the hook this bar is pivoted to a two-armed hand lever 10. At the end of the lever adjacent to the pivot connection of the bar 6, the bar 7 is also pivoted to the lever through a selected one of a series of pivot holes 14 in the bar 7. The hook 9 on the bar 7 is intended to engage one of the ends 2, 2' of the shaft of the roll 3. The respective arms of the lever 10 have the lengths indicated at x and y. The ratio x/y of the lever arms and a spacing b between the supporting pins 4, 4 and winding mandrels 11, 11' of the winding apparatus are designed to be such that the largest spacing z between the hooks 8 and 9 (see FIG. 1) is greater than the spacing b whilst the smallest hook spacing z"'"' (see FIG. 2) is smaller than the distance b.

A pawl 12 is pivoted to the hanger bar 6 and cooperates with a locking tooth 13 on the lever 10 as soon as the latter has reached the position illustrated in FIG. 2 when the hook spacing is at its minimum. The pawl and tooth prevent the [ever from being swung back again in the sense of increasing the hook spacing. The purpose of providing the series of holes 14 in the hanger bar 7 is to make it possible to adjust the pivotal connection between the bar 7 and lever 10 to suit the particular spacings b on winding apparatuses of different sizes.

If the winding apparatus has a rigid frame, the supporting pins 4, 4' will be permanently disposed vertically above the respective mandrels 11, 11. The supply roll to be lifted into the winding apparatus is rolled to a position adjacent the winding apparatus, the linkages 1, 1' are used to couple the roll shaft to the respective supporting pins 4, 4' and the levers 10 of the two linkages are then pulled to lift the roll until its shaft becomes positioned in the opening couplings of the mandrels -l l, 11'. However, in the illustrated winding apparatus, there is a rotary winding frame 5, 5 which is rotated on rollers 16 and 17 by a motor-driven pinion 15. The supporting pins 4, 4' are positioned in front of the mandrels 11, 11' as viewed in the direction c of rotation of the frame 5, 5'.

To lift the supply roll 3 into the winding apparatus with the rotary frame, the roll is rolled up to the position shown in FIG. 1 and the linkages l, 1 are applied to each shaft end 2, 2' and the corresponding supporting pins 4, 4', the latter having been brought into the vicinity of the roll 3 by turning the frame 5, 5'. By swinging each lever 10 in the direction of the arrow a, the roll 3 can be brought still closer to the winding apparatus simply by rolling along the ground until the spacing between the hooks 8, 9 is at a minimum and the pawls I2 engage behind the teeth 13. The levers 10 are now locked against swinging back. The frame 5, 5' is now set into rotation in the diretion of the arrow c by means of the motor-driven pinion until the roll 3 has reached the position shown in chaindotted lines in F162 and in full lines in FIG. 3 where the shaft ends 2, 2 are located vertically above the open couplings of the winding mandrels 11, 11'. By slightly depressing the levers 10, the pawls 12 can be pivoted out of engagement with their respective teeth 13 and the levers can then be swung in the direction of the arrow d to lower the roll 3 into engagement with the mandrels 11, 11. Still further movement of the levers 10 in the same direction d increases the spacing between the hooks 8, 9 to such an extent that the linkages 1, 1 may be unhooked from the roll and winding apparatus and removed.

I claim:

1. A device for applying a roll of paper or plastics web to a winding apparatus having a frame, winding mandrels supported by the frame for coupling to a shaft of the roll and coaxial supporting pins mounted on the frame so that they are disposed above the mandrels upon application of the roll, said device comprising two linkages, each adapted to cooperate with one end of said rollshaft and one of said supporting pins, each of said linkages comprising a manually operable lever, a first hanger bar pivotally connected at one end to said lever at a point on said lever such that said lever is divided into a longer and a shorter lever arm, a first hook for engaging one of said supporting pins attached to the other end of said first hanger bar, a second hanger bar pivotally connected to said lever at the end of said lever forming a part of said shorter lever arm, and a second hook for engaging one of the ends of said roller shaft attached to said second hanger bar.

2. A device according to claim 1 including means for locking the lever against pivotal movement relative to the first hanger bar.

3. A device according to claim 1, wherein the pivotal connection of the second hanger bar to the lever is adjustable.

4. A device according to claim 3, wherein the second hanger bar contains a series of holes for receiving a pivot pin connector in a selected one of the holes to connect said second hanger bar to said lever.

5. A device according to claim 1 wherein the pivotal connections between the lever and each linkage and the lengths of the hanger bars are such that the largest spacing of the hooks in each linkage is greater than the distance between the supporting pins and their respective winding mandrels and the smallest spacing of the hooks is less than said distance.

6. A device according to claim 5, wherein said frame is mounted for rotary movement.

7. A device according to claim 6, wherein, as viewed in the direction of frame rotation, the supporting pins are positioned at a point which is in front of the position of the mandrels. I

8. A device according to claim 6 including a pawl attached to the first hanger bar of each linkage and cooperating with a tooth on the lever to lock the lever in a position at which the hooks on the hanger bars of the linkage are at a predetermined spacing from one another.

* t i k i 

1. A device for applying a roll of paper or plastics web to a winding apparatus having a frame, winding mandrels supported by the frame for coupling to a shaft of the roll and coaxial supporting pins mounted on the frame so that they are disposed above the mandrels upon application of the roll, said device comprising two linkages, each adapted to cooperate with one end of said rollshaft and one of said supporting pins, each of said linkages comprising a manually operable lever, a first hanger bar pivotally connected at one end to said lever at a point on said lever such that said lever is divided into a longer and a shorter lever arm, a first hook for engaging one of said supporting pins attached to the other end of said first hanger bar, a second hanger bar pivotally connected to said lever at the end of said lever forming a part of said shorter lever arm, and a second hook for engaging one of the ends of said roller shaft attached to said second hanger bar.
 2. A device according to claim 1 including means for locking the lever against pivotal movement relative to the first hanger bar.
 3. A device according to claim 1, wherein the pivotal connection of the second hanger bar to the lever is adjustable.
 4. A device according to claim 3, wherein the second hanger bar contains a series of holes for receiving a pivot pin connector in a selected one of the holes to connect said second hanger bar to said lever.
 5. A device according to claim 1 wherein the pivotal connections between the lever and each linkage and the lengths of the hanger bars are such that the largest spacing of the hooks in each linkage is greater than the distance between the supporting pins and their respective winding mandrels and the smallest spacing of the hooks is less than said distance.
 6. A device according to claim 5, wherein said frame is mounted for rotary movement.
 7. A device according to claim 6, wherein, as viewed in the direction of frame rotation, the supporting pins are positioned at a point which is in front of the position of the mandrels.
 8. A device according to claim 6 including a pawl attached to the first hanger bar of each linkage and co-operating with a tooth on the lever to lock the lever in a position at which the hooks on the hanger bars of the linkage are at a predetermined spacing from one another. 